Method of making dimensionally reproducible compac

专利名称：Method of making dimensionally

reproducible compacts

发明人：Natraj C. Iyer,Alan T. Male,William R. Lovic申请号：US07/374330申请日：190630公开号：US04909841A公开日：19900320

摘要：A process of hot pressing of materials to form articles or compacts is

characterized by the steps: (A) providing a compactable particulate mixture; (B) uniaxiallypressing the particles without heating to provide article or compact (22); (C) placing atleast one article or compact (22) in an open pan (31) having an insertable frame (32) withedge surfaces (34) that are not significantly pressure deformable, where the inside sidesurfaces of the frame are parallel to the central axis B--B of the open pan, and whereeach article or compact is surrounded by fine particles of a separating material; (D)evacuating air from the container and sealing the articles or compacts inside the

container by means of top lid (36); (E) hot pressing the compacts at a pressure from 352.5kg/cm. sup.2 to 3,172 kg/cm.sup.2 to provide simultaneous hot pressing and densificationof the articles or compacts; (F) gradually cooling and releasing the pressure; and, (G)separating the articles or compacts from the container, where there is no heating of thecompacts in the process before step (E).

申请人：WESTINGHOUSE ELECTRIC CORP.

代理人：Daniel P. Cillo

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